US11071094B2 - Data transmission method, user equipment, and radio access device - Google Patents

Data transmission method, user equipment, and radio access device Download PDF

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Publication number
US11071094B2
US11071094B2 US16/454,879 US201916454879A US11071094B2 US 11071094 B2 US11071094 B2 US 11071094B2 US 201916454879 A US201916454879 A US 201916454879A US 11071094 B2 US11071094 B2 US 11071094B2
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transmission
uplink data
class
user equipment
logical channel
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US20190320416A1 (en
Inventor
Lifeng Han
Jian Zhang
Qinghai Zeng
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Assigned to HUAWEI TECHNOLOGIES CO., LTD. reassignment HUAWEI TECHNOLOGIES CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HAN, LIFENG, ZENG, QINGHAI, ZHANG, JIAN
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/02—Selection of wireless resources by user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
    • H04W72/563—Allocation or scheduling criteria for wireless resources based on priority criteria of the wireless resources
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/02—Data link layer protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/08—Upper layer protocols

Definitions

  • Embodiments of this application relate to the field of communications technologies, and in particular, to a data transmission method, user equipment, and a radio access device.
  • LTE long term evolution
  • the user equipment needs to first request, from a radio access device, a resource required to transmit the uplink data. Specifically, the user equipment reports an amount of to-be-sent uplink data to the radio access device.
  • the radio access device allocates a resource to the user equipment according to a specific policy and based on resource usage and amounts of to-be-sent uplink data that are reported by all user equipments, and indicates an available transmission resource to the user equipment.
  • the user equipment transmits data after receiving a transmission resource indication.
  • the user equipment determines, based on a service priority of the uplink data, a sequence for using the transmission resources.
  • different services have requirements for a packet loss rate in addition to requirements for a service priority, and there is no correspondence between the packet loss rate and the service priority.
  • a service with a low service priority may have a relatively high requirement for a packet loss rate (this is corresponding to a case in which the packet loss rate is relatively low).
  • only the service priority is considered, and consequently transmission resources used for a service with a relatively high requirement for the packet loss rate cannot ensure a packet loss rate of the service. As a result, it is difficult to meet different transmission requirements of different uplink data.
  • Embodiments of this application provide a data transmission method, user equipment, and a radio access device. Different transmission resources are allocated to uplink data on LCHs of different transmission classes, to meet different requirements of different uplink data.
  • an embodiment of this application provides a data transmission method, including:
  • one LCH is corresponding to one transmission class
  • the transmission class of the LCH may be determined based on at least one of: a reliability class and a delay class of a service on the LCH; and optionally may be determined based on a service priority.
  • the transmission class includes at least one of: the reliability class and the delay class of the service, and optionally may further include the service priority.
  • the transmission class is determined based on at least two of a service priority, a reliability class, and a delay class of the service; or the transmission class is determined based on at least two of parameters such as a priority, a reliability requirement, and a delay requirement of the service.
  • different logical channels in the user equipment are corresponding to different transmission classes.
  • the user equipment transmits the uplink data by using a transmission format used for the uplink data on the logical channel corresponding to the transmission class, and transmission resources in the transmission format.
  • transmission resources used for uplink data that are determined based on transmission classes can meet different requirements of different uplink data, thereby improving data transmission flexibility.
  • the method before the determining, by the user equipment based on the first information, a transmission format of uplink data on at least one logical channel corresponding to at least one transmission class in the different transmission classes, and determining transmission resources in the transmission format, the method further includes:
  • the radio access device can allocate transmission resources to the user equipment based on the amounts of to-be-sent uplink data, thereby improving resource allocation effectiveness.
  • the method before the determining, by the user equipment based on the first information, a transmission format of uplink data on at least one logical channel corresponding to at least one transmission class in the different transmission classes, and determining transmission resources in the transmission format, the method further includes:
  • third information sent by the radio access device, where the third information indicates the transmission format used for the uplink data on the at least one logical channel corresponding to the at least one transmission class in the different transmission classes, and indicates the transmission resources in the transmission format.
  • the third information carries each transmission class in the at least one transmission class, a transmission format corresponding to each transmission class, and transmission resources in the transmission format corresponding to the transmission class;
  • the third information includes a transmission format corresponding to each transmission class in the at least one transmission class, and includes transmission resources in the transmission format corresponding to the transmission class; and each transmission class is indicated by using a second location index corresponding to the transmission class, and the second location index is used to identify the transmission format corresponding to each transmission class in the at least one transmission class and a location, in the third information, of the transmission resources in the transmission format corresponding to the transmission class; or
  • the third information includes a transmission format corresponding to each transmission class in the at least one transmission class, and includes transmission resources in the transmission format corresponding to the transmission class.
  • the at least one transmission class comprises all transmission classes in the different transmission classes.
  • the at least one transmission class is a transmission class indicated by the radio access device in the different transmission classes.
  • the method further includes:
  • uplink data on each logical channel in the at least one logical channel is a plurality of uplink data packets, and the method further includes:
  • the method before the preferentially allocating, by the user equipment, more transmission resources to an uplink data packet with a high service priority in the plurality of uplink data packets, the method further includes:
  • the method further includes: in a process in which the user equipment sends uplink data on a target logical channel, where the target logical channel is a logical channel in the at least one logical channel,
  • a timer, at a PDCP layer, of a target data packet in the uplink data expires, discarding, by the user equipment, the target data packet at the PDCP layer; and notifying, by using an RLC layer, an RLC layer of the radio access device of an identifier of the target data packet.
  • the method further includes: in a process in which the user equipment sends uplink data on a target logical channel, where the target logical channel is a logical channel in the at least one logical channel,
  • a timer, at an RLC layer, of a target data packet in the uplink data expires, discarding, by the user equipment, the target data packet at the RLC layer; and notifying, by using the RLC layer, an RLC layer of the radio access device of an identifier of the target data packet.
  • the method further includes: in a process in which the user equipment sends uplink data on a target logical channel, where the target logical channel is a logical channel in the at least one logical channel,
  • a timer, at a MAC layer, of a target data packet in the uplink data expires, discarding, by the user equipment, the target data packet at the MAC layer; and notifying, by using an RLC layer, an RLC layer of the radio access device of an identifier of the target data packet.
  • an embodiment of this application provides a data transmission method, including:
  • the first information is used by the user equipment to determine a transmission format of uplink data on at least one logical channel corresponding to at least one transmission class in the different transmission classes, and determine transmission resources in the transmission format.
  • different logical channels in the user equipment are corresponding to different transmission classes.
  • the user equipment transmits the uplink data by using a transmission format used for the uplink data on the logical channel corresponding to the transmission class, and transmission resources in the transmission format.
  • transmission resources used for uplink data that are determined based on transmission classes can meet different requirements of different uplink data, thereby improving data transmission flexibility.
  • the method further includes:
  • the radio access device receiving, by the radio access device, second information from the user equipment, where the second information indicates an amount of the to-be-sent uplink data on the at least one logical channel corresponding to the at least one transmission class in the different transmission classes.
  • the radio access device allocates a transmission format and transmission resources in the transmission format to the at least one logical channel based on the second information.
  • the method further includes: sending, by the radio access device, third information to the user equipment, where the third information indicates the transmission format used for the uplink data on the at least one logical channel corresponding to the at least one transmission class in the different transmission classes, and indicates the transmission resources in the transmission format.
  • the third information carries each transmission class in the at least one transmission class, a transmission format corresponding to each transmission class, and transmission resources in the transmission format corresponding to the transmission class;
  • the third information includes a transmission format corresponding to each transmission class in the at least one transmission class, and includes transmission resources in the transmission format corresponding to the transmission class; and each transmission class is indicated by using a second location index corresponding to the transmission class, and the second location index is used to identify the transmission format corresponding to each transmission class in the at least one transmission class and a location, in the third information, of the transmission resources in the transmission format corresponding to the transmission class; or
  • the third information includes a transmission format corresponding to each transmission class in the at least one transmission class, and includes transmission resources in the transmission format corresponding to the transmission class.
  • the method further includes: sending, by the radio access device, fourth information to the user equipment, where the fourth information indicates a first location index of each transmission class in the at least one transmission class, and the first location index is used to identify a location, in the second information, of an amount of to-be-sent uplink data of each transmission class in the at least one transmission class. This can save a transmission bit, and improve data transmission efficiency.
  • an embodiment of this application provides user equipment, including:
  • a receiving unit configured to receive first information sent by a radio access device, where the first information indicates different transmission classes corresponding to a plurality of logical channels;
  • a determining unit configured to, based on the first information, determine a transmission format of uplink data on at least one logical channel corresponding to at least one transmission class in the different transmission classes, and determine transmission resources in the transmission format;
  • a sending unit configured to send the uplink data by using the transmission format and the transmission resources in the transmission format.
  • the user equipment provided in the third aspect of the embodiments of this application is configured to perform the data transmission method provided in the first aspect of this application.
  • the user equipment provided in the third aspect of the embodiments of this application is configured to perform the data transmission method provided in the first aspect of this application.
  • a structure of the user equipment includes a processor and a transceiver.
  • the processor is configured to perform the data transmission method provided in the first aspect of this application.
  • the structure of the user equipment may further include a memory.
  • the memory is configured to store application program code that supports the user equipment in performing the foregoing method, and the processor is configured to perform the application program stored in the memory.
  • an embodiment of this application provides a radio access device, including:
  • a sending unit configured to send first information to user equipment, where the first information indicates different transmission classes corresponding to a plurality of logical channels;
  • the first information is used by the user equipment to determine a transmission format of uplink data on at least one logical channel corresponding to at least one transmission class in the different transmission classes, and determine transmission resources in the transmission format.
  • the radio access device provided in the fourth aspect of the embodiments of this application is configured to perform the data transmission method provided in the second aspect of this application.
  • the radio access device provided in the fourth aspect of the embodiments of this application is configured to perform the data transmission method provided in the second aspect of this application.
  • a structure of the radio access device includes a processor and a transceiver.
  • the processor is configured to perform the data transmission method provided in the second aspect of this application.
  • the structure of the radio access device may further include a memory.
  • the memory is configured to store application program code that supports the radio access device in performing the foregoing method, and the processor is configured to perform the application program stored in the memory.
  • an embodiment of this application provides a computer storage medium, configured to store a computer software instruction used by the user equipment, and the computer software instruction includes a program designed to perform the foregoing aspects.
  • an embodiment of this application provides a computer storage medium, configured to store a computer software instruction used by the radio access device, and the computer software instruction includes a program designed to perform the foregoing aspects.
  • names of the user equipment and the radio access device constitute no limitation on the devices. In actual implementation, these devices may appear with other names. Provided that functions of the devices are similar to those in this application, the devices fall within the scope of the claims of this application and their equivalent technologies.
  • different logical channels in the user equipment are corresponding to different transmission classes.
  • the user equipment transmits the uplink data by using a transmission format used for the uplink data on the logical channel corresponding to the transmission class, and transmission resources in the transmission format.
  • the transmission class includes at least one of: a reliability class and a delay class of service, and optionally may further include a service priority; or the transmission class is determined based on at least two of a service priority, a reliability class, and a delay class of a service. Therefore, transmission resources used for uplink data that are determined based on transmission classes can meet different requirements of different uplink data, thereby improving data transmission flexibility.
  • FIG. 1 is a diagram of a possible network architecture according to an embodiment of this application.
  • FIG. 2 is a schematic flowchart of a data transmission method according to an embodiment of this application.
  • FIG. 3 is a schematic flowchart of another data transmission method according to an embodiment of this application.
  • FIG. 4 is a schematic flowchart of another data transmission method according to an embodiment of this application.
  • FIG. 5 is a schematic modular diagram of user equipment according to an embodiment of this application.
  • FIG. 6 is a schematic structural diagram of user equipment according to an embodiment of this application.
  • FIG. 7 is a schematic modular diagram of a radio access device according to an embodiment of this application.
  • FIG. 8 is a schematic structural diagram of a radio access device according to an embodiment of this application.
  • FIG. 1 is a diagram of a possible network structure according to an embodiment of this application.
  • the network architecture shown in FIG. 1 may include user equipment and a radio access device.
  • the user equipment When the user equipment has uplink data that needs to be transmitted, the user equipment needs to first request, from the radio access device, transmission resources required to transmit the uplink data. Specifically, the user equipment reports an amount of to-be-sent uplink data on a/each logical channel (LCH) to the radio access device. For example, the user equipment notifies the radio access device of the amount of to-be-sent uplink data in the user equipment by using a buffer status report (BSR).
  • BSR buffer status report
  • the radio access device allocates transmission resources to the user equipment based on the amount, of to-be-sent uplink data, that is reported by the user equipment and current transmission resource usage, and indicates available transmission resources to the user equipment.
  • the user equipment transmits data after receiving a transmission resource indication.
  • the user equipment determines, based on a service priority of the uplink data, a sequence for using the transmission resources.
  • uplink data with a high service priority is preferably transmitted on the transmission resources, and a service with a low service priority is sent later.
  • different services have requirements for a packet loss rate in addition to requirements for a service priority, and there is no correspondence between the packet loss rate and the service priority.
  • a service with a low service priority may have a relatively high requirement for the packet loss rate (this is corresponding to a case in which the packet loss rate is relatively low).
  • different logical channels in the user equipment are corresponding to different transmission classes.
  • the user equipment transmits the uplink data by using a transmission format used for the uplink data on the logical channel corresponding to the transmission class, and transmission resources in the transmission format.
  • the transmission class includes at least one of: a reliability class and a delay class of the service, and may further include a service priority; or the transmission class is determined based on at least two of a service priority, a reliability class, and a delay class of a service. Therefore, transmission resources used for uplink data that are determined based on transmission classes implement that different transmission resources are allocated to uplink data on LCHs of different transmission classes, and can meet different requirements of different uplink data, thereby improving data transmission flexibility.
  • the user equipment may include but is not limited to a terminal, a mobile station (MS), and the like.
  • the user equipment may be a mobile phone (or referred to as a “cellular” phone), or may be a portable, pocket-sized, handheld, computer built-in, or in-vehicle mobile apparatus (a smart band, a smartwatch, smart glasses, or the like).
  • a radio access device and the user equipment in the embodiments of this application may appear with other names. Provided that functions of the devices are similar to those in this application, the devices fall within the scope of the claims of this application and their equivalent technologies.
  • FIG. 2 is a schematic flowchart of a data transmission method according to an embodiment of this application.
  • the data transmission method in this embodiment of this application includes step 101 to step 103 .
  • the data transmission method in this embodiment of this application is performed through interaction between user equipment and a radio access device.
  • a specific process refer to the following detailed descriptions.
  • the radio access device sends first information to the user equipment, where the first information indicates different transmission classes corresponding to a plurality of logical channels (two or more logical channels).
  • One LCH is corresponding to one transmission class, and the transmission class of the LCH may be determined based on at least one of: a reliability class and a delay class of a service on the LCH, and optionally may be determined based on a service priority.
  • the transmission class includes at least one of: the reliability class and the delay class of the service, and optionally may further include the service priority.
  • the transmission class is determined based on at least two of a service priority, a reliability class, and a delay class of the service; or the transmission class is determined based on at least two of parameters such as a priority, a reliability requirement, and a delay requirement of the service.
  • the reliability class of the service is a requirement class of the service for transmission reliability.
  • the delay class of the service is a requirement class of the service for a transmission delay.
  • the transmission delay is a transmission time for transmitting uplink data from the user equipment to a core network device, or the transmission delay is a transmission time for transmitting uplink data from the user equipment to the radio access device.
  • the transmission delay may be determined by subtracting an estimated transmission time for transmitting the uplink data from the radio access device to the core network device from the transmission time for transmitting the uplink data from the user equipment to the core network device.
  • the service priority is used to represent a class for scheduling uplink data, for example, information about which service is sent first and which service is sent later.
  • determining the transmission class based on the reliability class of the service and the delay class of the service is generating a transmission class based on the reliability class and the delay class of the service.
  • the transmission class may be obtained in a weighting manner of performing a weighting operation on the reliability class and the delay class. If the reliability class is 1, the delay class is 2, and weighting coefficients are respectively 40% and 60%, a transmission class value is 1.6.
  • the transmission class may be generated by using a pre-configured relationship between a transmission class and each of a reliability class and a delay class. If the reliability class is 1, and the delay class is 2, the transmission class obtained based on the pre-configured relationship is 3.
  • the radio access device may directly determine, based on at least one of: a reliability class and a delay class of the service, and optionally based on a service priority, a transmission class of the LCH on which the service is located.
  • the radio access device may first determine a transmission class of each service based on at least one of: a reliability class and a delay class of the service, and optionally based on a service priority, and then combine transmission classes of the plurality of services on the LCH to obtain one transmission class of the LCH.
  • the radio access device may determine a combination manner according to a preset algorithm, and notify the user equipment of the combined transmission class of the LCH.
  • the preset algorithm may be selecting a highest transmission class from the transmission classes of the plurality of services, or weighting the plurality of transmission classes to generate a weighted value.
  • the user equipment receives the first information sent by the radio access device, and stores the transmission classes corresponding to the LCHs.
  • different transmission classes of a plurality of LCHs may be transmitted for a plurality of times.
  • a transmission class of one LCH is sent at a time, or transmission classes of at least two LCHs are sent at a time.
  • the radio access device may send the different transmission classes of the plurality of LCHs for a plurality of times.
  • the first information may include a transmission class of one or more LCHs.
  • the service in this embodiment of this application may be a group of data flows (QoS flow) having a same quality of service QoS parameter.
  • representation forms of the different transmission classes that are corresponding to the plurality of logical channels and that are indicated in the first information are shown in Table 1.
  • One logical channel in a logical channel group is corresponding to one transmission class, and bears at least one service of this transmission class.
  • the user equipment determines a transmission format of uplink data on at least one logical channel corresponding to at least one transmission class in the different transmission classes, and determines transmission resources in the transmission format.
  • the user equipment determines a transmission class of an LCH having to-be-transmitted uplink data, and determines a transmission format of uplink data on an LCH corresponding to each transmission class. For example, if transmission classes of LCHs having to-be-transmitted uplink data are a transmission class A and a transmission class B, the transmission class A is corresponding to two LCHs, and the transmission class B is corresponding to one LCH, the user equipment determines a transmission format of uplink data on the two LCHs corresponding to the transmission class A, and determines a transmission format of uplink data on one LCH corresponding to the transmission class B.
  • the user equipment selects transmissions resource in the transmission format.
  • the transmission format may include but is not limited to a transmission time interval (TTI) format, a modulation and coding scheme (MCS) format, a hybrid automatic repeat request (HARQ) configuration, a multiple-input multiple-output (MIMO) configuration, a beam resources, and a numerology.
  • the numerology means that configuration parameters used for orthogonal frequency division multiplexing (OFDM) are different at a physical layer.
  • the configuration parameters are different in terms of at least one of: a subcarrier spacing and a guard prefix length.
  • time-frequency resources included in a resource element (RE) are different from time-frequency resources included in a resource block (RB).
  • the transmission resources are physical time-frequency resources, may be represented in a form of an RE, an RB, or the like, and may further include transmission resources such as HARQs at a media access control (MAC) layer.
  • MAC media access control
  • one subcarrier in frequency domain and one symbol in time domain may be referred to as one RE.
  • 12 consecutive subcarriers in frequency domain and one slot in time domain may be referred to as one RB.
  • a representation format of the physical time-frequency resources is not limited herein.
  • the user equipment sends the uplink data by using the transmission format and the transmission resources in the transmission format.
  • the user equipment sends the to-be-transmitted uplink data on the LCH by using the determined transmission resources.
  • the radio access device receives the uplink data sent by the user equipment.
  • different LCHs in the user equipment are corresponding to different transmission classes.
  • the user equipment transmits the uplink data by using a transmission format used for the uplink data on the LCH corresponding to the transmission class, and transmission resources in the transmission format.
  • the transmission class includes at least one of: a reliability class and a delay class of the service, and optionally may further include a service priority; or the transmission class is determined based on at least two of a service priority, a reliability class, and a delay class of a service. Therefore, transmission resources used for uplink data that are determined based on transmission classes can meet different requirements of different uplink data, thereby improving data transmission flexibility.
  • FIG. 3 shows another data transmission method according to an embodiment of this application.
  • the data transmission method in this embodiment of this application includes step 201 to step 207 .
  • the data transmission method in this embodiment of this application is performed through interaction between user equipment and a radio access device.
  • a transmission class is a transmission class of an LCH.
  • the radio access device sends first information to the user equipment, where the first information indicates different transmission classes corresponding to a plurality of logical channels.
  • One LCH is corresponding to one transmission class, and the transmission class of the LCH may be determined based on at least one of: a reliability class and a delay class of a service on the LCH, and optionally may be determined based on a service priority.
  • the transmission class includes at least one of: the reliability class and the delay class of the service, and optionally may further include the service priority.
  • the transmission class is determined based on at least two of a service priority, a reliability class, and a delay class of the service; or the transmission class is determined based on at least two of parameters such as a priority, a reliability requirement, and a delay requirement of the service.
  • the reliability class of the service is a requirement class of the service for transmission reliability.
  • the delay class of the service is a requirement class of the service for a transmission delay.
  • the transmission delay is a transmission time for transmitting uplink data from the user equipment to a core network device, or the transmission delay is a transmission time for transmitting uplink data from the user equipment to the radio access device.
  • the transmission delay may be determined by subtracting an estimated transmission time for transmitting the uplink data from the radio access device to the core network device from the transmission time for transmitting the uplink data from the user equipment to the core network device.
  • the service priority is used to represent a class for scheduling uplink data, for example, information about which service is sent first and which service is sent later.
  • determining the transmission class based on the reliability class of the service and the delay class of the service is generating a transmission class based on the reliability class and the delay class of the service.
  • the transmission class may be obtained in a weighting manner of performing a weighting operation on the reliability class and the delay class. If the reliability class is 1, the delay class is 2, and weighting coefficients are respectively 40% and 60%, a transmission class value is 1.6.
  • the transmission class may be generated by using a pre-configured relationship between a transmission class and each of a reliability class and a delay class. If the reliability class is 1, and the delay class is 2, the transmission class obtained based on the pre-configured relationship is 3.
  • the radio access device may directly determine, based on at least one of: a reliability class and a delay class of the service, and optionally based on a service priority, a transmission class of the LCH on which the service is located.
  • the radio access device may first determine a transmission class of each service based on at least one of: a reliability class and a delay class of the service, and optionally based on a service priority, and then combine transmission classes of the plurality of services on the LCH to obtain one transmission class of the LCH.
  • the radio access device may determine a combination manner according to a preset algorithm, and notify the user equipment of the combined transmission class of the LCH.
  • the preset algorithm may be selecting a highest transmission class from the transmission classes of the plurality of services, or weighting the plurality of transmission classes to generate a weighted value.
  • the user equipment receives the first information sent by the radio access device, and stores the transmission classes corresponding to the LCHs.
  • different transmission classes of a plurality of LCHs may be transmitted for a plurality of times.
  • a transmission class of one LCH is sent at a time, or transmission classes of at least two LCHs are sent at a time.
  • the radio access device may send the different transmission classes of the plurality of LCHs for a plurality of times.
  • the first information may include a transmission class of one or more LCHs.
  • the service in this embodiment of this application may be a group of data flows (QoS flow) having a same QoS parameter.
  • the first information sent by the radio access device to the user equipment is a service identifier and a transmission class corresponding to the service identifier.
  • An LCH on which uplink data indicated by the service identifier is located is determined based on the service identifier, and a transmission class corresponding to the LCH is further determined.
  • the service identifier may be a traffic flow template (TFT) or a data flow identifier (flow ID) that is corresponding to a service, or a QoS identifier of a service.
  • TFT traffic flow template
  • flow ID data flow identifier
  • there are three transmission classes such as a high class, a medium class, and a low class. If a value is used to represent a transmission class, the transmission class sent by the radio access device may be represented by setting a value, for example, 1, 2, 3, . . . , N, where 1 represents a highest class, and N represents a lowest class.
  • the first information sent by the radio access device to the user equipment is a service identifier of uplink data and a QoS parameter corresponding to the service identifier of the uplink data.
  • a transmission class of an LCH on which a service indicated by the service identifier is located is determined based on a correspondence between a service identifier and a transmission class.
  • the user equipment After receiving the service identifier of the uplink data and the QoS parameter corresponding to the service identifier of the uplink data that are sent by the radio access device, the user equipment determines, based on a table of a mapping relationship between a QoS parameter and a transmission class, the transmission class of the LCH on which the service indicated by the service identifier is located.
  • the core network device notifies the radio access device of the QoS.
  • the radio access device may preset the table of the mapping relationship between a QoS parameter and a transmission class, and notify the user equipment of the mapping relationship table, so that the user equipment determines a transmission class of each LCH by using the table of the mapping relationship between a QoS parameter and a transmission class.
  • the QoS parameter includes one or more of parameters such as a priority, a packet loss rate, a transmission delay, and a rate.
  • the table of the mapping relationship between a QoS parameter and a transmission class may be a table of a mapping relationship between a QoS class identifier (QCI) and a transmission class.
  • the table of the mapping relationship between a QoS parameter and a transmission class may be a table of a mapping relationship between a packet loss rate and a reliability class in a transmission class, for example, a mapping relationship table in which a reliability class in a transmission class corresponding to a packet loss rate in a range of (10 ⁇ 7 to 10 ⁇ 6 ) is 1, a reliability class in a transmission class corresponding to a packet loss rate in a range of (10 ⁇ 6 to 10 ⁇ 3 ) is 2, and so on.
  • the table of the mapping relationship between a QoS parameter and a transmission class may be a table of a mapping relationship between a delay indicator and a delay class in a transmission class. For example, when the delay indicator is 100 ms, a delay class in a corresponding transmission class is 1; or when a delay indicator is 300 ms, a delay class in a corresponding transmission class is 9.
  • the first information sent by the radio access device to the user equipment is a service identifier of downlink data and a QoS parameter corresponding to the service identifier of the downlink data.
  • the user equipment After receiving the service identifier of the downlink data and the QoS parameter corresponding to the service identifier of the downlink data, the user equipment first obtains an IP 5-tuple of the downlink data of a service, and obtains an IP 5-tuple of uplink data of the service by inverting IP 5-tuple information of the downlink data.
  • the IP 5-tuple includes a source IP address, a source port, a destination IP address, a destination port, and a transport layer protocol.
  • An inversion function may be implemented by inverting the source IP address and the destination IP address, and inverting a source port number and a destination port number. Then the user equipment associates an inverted IP 5-tuple with a service identifier of the uplink data of the service, and the identifier of the uplink data is the same as the identifier of the downlink data. Finally, the user equipment determines the QoS parameter corresponding to the service identifier of the downlink data as a QoS parameter corresponding to the service identifier of the uplink data.
  • the user equipment may reference the second feasible solution to determine, based on the table of the mapping relationship between a QoS parameter and a transmission class, a transmission class corresponding to the service identifier, and further determine, based on a correspondence between a service identifier and an LCH, a transmission class corresponding to an LCH.
  • the correspondence between a service identifier and an LCH means that an LCH on which uplink data of a service indicated by a service identifier is an LCH corresponding to the service identifier.
  • the user equipment may determine a transmission class based on an indication identifier in to-be-transmitted uplink data.
  • the user equipment obtains indication identifiers that are set for uplink data on an LCH and that are in some fields of an IP layer protocol header, and then determines a transmission class of the LCH based on a table of a mapping relationship between an indication identifier and a transmission class.
  • indication identifiers may be set in some fields of the IP layer protocol header of the uplink data, for example, different values of a differentiated services code point (DSCP) are corresponding to different transmission classes. For example, it is set that 000 represents a low transmission class, 010 represents a medium transmission class, and 110 represents a high transmission class.
  • DSCP differentiated services code point
  • the first information may further include a parameter of prioritized bit rate (PBR) resources of a service.
  • PBR prioritized bit rate
  • the user equipment sends second information to the radio access device, where the second information indicates an amount of the to-be-sent uplink data on the at least one logical channel corresponding to at least one transmission class in the different transmission classes.
  • the user equipment may report an amount of to-be-sent uplink data on an LCH corresponding to each transmission class in the different transmission classes, or the user equipment may report amounts of to-be-sent uplink data on LCHs corresponding to several transmission classes in the different transmission classes.
  • any transmission class in the different transmission classes is a target transmission class. If the target transmission class is corresponding to one LCH, an amount of to-be-sent uplink data is an amount of uplink data on the LCH; or if the target transmission class is corresponding to a plurality of LCHs, an amount of to-be-sent uplink data is a total amount of uplink data on the plurality of LCHs.
  • step 202 may be further performed, that is, the user equipment receives fourth information sent by the radio access device. Details are as follows.
  • the fourth information is used to instruct the user equipment to report a transmission class of an LCH having an amount of to-be-sent uplink data.
  • the fourth information may be used to instruct the user equipment to report the amount of to-be-sent uplink data based on a transmission class.
  • the user equipment separately collects statistics about amounts of to-be-sent uplink data on LCHs of transmission classes in the user equipment.
  • the second information sent by the user equipment may include a plurality of transmission classes and an amount of to-be-sent uplink data of each transmission class.
  • the fourth information is used to instruct the user equipment to report a transmission class of an LCH having an amount of to-be-sent uplink data.
  • the fourth information may be used to instruct to report a target transmission class of the amount of to-be-sent uplink, for example, instruct the user equipment to report amounts of to-be-sent uplink data of several transmission classes, or report an amount of to-be-sent uplink data on an LCH of a relatively high transmission class.
  • the user equipment collects statistics about amounts of to-be-sent uplink data on LCHs of transmission classes that are notified by the user equipment.
  • the second information sent by the user equipment includes the amounts of to-be-sent uplink data of the transmission classes, and optionally may further include the transmission classes.
  • the fourth information indicates a first location index of each transmission class in the at least one transmission class, and the first location index is used to identify a location, in the second information, of an amount of to-be-sent uplink data of each transmission class in the at least one transmission class.
  • the user equipment determines, based on a correspondence between a location index and a transmission class, a first transmission class corresponding to the first location index, and then collects statistics about amounts of to-be-sent uplink data on LCHs of the first transmission class in the user equipment. In this way, the amounts of to-be-sent uplink data are written at a location that is corresponding to the first location index and that is in the second information sent by the user equipment.
  • a transmission class of a service is represented in a manner in which the radio access device configures a location index for the user equipment.
  • different location indexes represent different transmission classes. Therefore, after receiving the fourth information, the user equipment collects statistics about amounts of to-be-sent uplink data based on the first location index and reports the amounts of to-be-sent uplink data based on the first location index, and writes the amounts of to-be-sent uplink data at the location that is corresponding to the first location index and that is in the second information. This can save a transmission bit, and improve data transmission efficiency.
  • the fourth information may be used to instruct the user equipment to report an amount of to-be-sent uplink data based on a logical channel group (LCG).
  • LCG logical channel group
  • One LCG includes one or more LCHs, and the radio access device notifies the user equipment of the LCG and the LCH included in the LCG
  • the user equipment separately collects statistics about a total amount of to-be-sent uplink data corresponding to each LCG and the total amount of to-be-sent uplink data is a sum of amounts of to-be-sent uplink data on all LCHs included in the LCG
  • the radio access device receives the second information.
  • the radio access device allocates a transmission format and transmission resources in the transmission format to the at least one logical channel based on the second information.
  • the radio access device After receiving the second information, the radio access device searches available transmission resources for transmission resources corresponding to a transmission class determined based on the second information.
  • the radio access device may receive second information indicating a plurality of transmission classes of a plurality of user equipments.
  • the radio network device comprehensively considers factors such as a total quantity of currently unused transmission resources and a quantity of transmission resources required by each user equipment, to allocate a specific quantity of transmission resources to the transmission class indicated in the second information of the user equipment in this embodiment.
  • the radio access device may allocate a specific quantity of transmission resources to an LCH corresponding to each transmission class indicated in the second information, or allocate a specific quantity of transmission resources to LCHs corresponding to several transmission classes in the plurality of transmission classes indicated in the second information.
  • the transmission format may include but is not limited to a TTI format, an MCS format, a HARQ configuration, an MIMO configuration, beam resources, and a Numerology.
  • the Numerology means that configuration parameters used for OFDM are different at a physical layer.
  • the configuration parameters are different in terms of at least one of: a subcarrier spacing and a guard prefix length.
  • time-frequency resources included in an RE are different from time-frequency resources included in an RB.
  • the transmission resources are physical time-frequency resources, may be represented in a form of an RE, an RB, or the like, and may further include transmission resources such as HARQs at MAC layer.
  • one subcarrier in frequency domain and one symbol in time domain may be referred to as one RE.
  • 12 consecutive subcarriers in frequency domain and one slot in time domain may be referred to as one RB.
  • a representation format of the physical time-frequency resources is not limited herein.
  • the radio access device sends third information to the user equipment, where the third information indicates the transmission format used for the uplink data on the at least one logical channel corresponding to the at least one transmission class in the different transmission classes, and indicates the transmission resources in the transmission format.
  • each transmission class in the at least one transmission class in the third information is indicated in an explicit manner or an implicit manner.
  • the third information carries each transmission class in the at least one transmission class, a transmission format corresponding to each transmission class, and transmission resources in the transmission format corresponding to the transmission class.
  • the third information includes a transmission format corresponding to each transmission class in the at least one transmission class, and includes transmission resources in the transmission format corresponding to the transmission class.
  • Each transmission class is indicated by using a second location index corresponding to the transmission class, and the second location index is used to identify the transmission format corresponding to each transmission class in the at least one transmission class and a location, in the third information, of the transmission resources in the transmission format corresponding to the transmission class.
  • the radio access device may write, at a location indicated by the second location index corresponding to the transmission class and based on a table of a mapping relationship between a second location index and a transmission class, the transmission format corresponding to each transmission class, and the transmission resources in the transmission format corresponding to the transmission class.
  • Each transmission class is indicated by using a format of transmission resources corresponding to the transmission class
  • the third information includes the transmission format corresponding to each transmission class in the at least one transmission class, and includes the transmission resources in the transmission format corresponding to the transmission class.
  • the radio access device may add, to the third information based on a table of a mapping relationship between a transmission format and a transmission class, the transmission format corresponding to each transmission class, and the transmission resources in the transmission format corresponding to the transmission class.
  • third information generated in an implicit manner occupies fewer bits than third information generated in an explicit manner.
  • the user equipment receives the third information sent by the radio access device.
  • the user equipment determines the transmission format of the uplink data on the at least one logical channel corresponding to the at least one transmission class in the different transmission classes, and determines the transmission resources in the transmission format.
  • the user equipment determines, based on the received third information, the transmission format of the uplink data on the at least one LCH corresponding to the at least one transmission class in the different transmission classes, and determines the transmission resources in the transmission format.
  • the user terminal may directly determine the transmission format corresponding to each transmission class in the at least one transmission class, and determine the transmission resources in the transmission format corresponding to the transmission class, and then determine, based on an LCH corresponding to each transmission class in the at least one transmission class, a transmission format used for uplink data on each LCH and determine transmission resources in the transmission format.
  • the user terminal When each transmission class in the at least one transmission class is indicated in the third information in an implicit manner, if the transmission class is indicated by using the second location index, the user terminal first determines the location at which the transmission format and the transmission resources in the transmission format are located in the third information, determines a target location index of the location, and then determines, based on the table of the mapping relationship between a second location index and a transmission class, a target transmission class corresponding to the target location index, so as to determine a transmission format used for uplink data on an LCH of the target transmission class and determine transmission resources in the transmission format.
  • the user terminal When each transmission class in the at least one transmission class is indicated in the third information in an implicit manner, if the transmission class is indicated by using the transmission format, the user terminal first determines a target transmission format included in the third information, and then determines, based on the table of the mapping relationship between a transmission format and a transmission class or according to an internal algorithm of the user equipment, a target transmission class corresponding to the target transmission format, so as to determine a transmission format used for uplink data on an LCH of the target transmission class and determine transmission resources in the transmission format.
  • the user equipment sends the uplink data by using the transmission format and the transmission resources in the transmission format.
  • the uplink data on the LCH corresponding to the target transmission class is a plurality of uplink data packets.
  • the target transmission class may be corresponding to one LCH, or may be corresponding to a plurality of LCHs.
  • the plurality of uplink data packets may be related to one service, or may be related to a plurality of services.
  • the uplink data packet also has at least one of: a corresponding reliability class, delay class, and service priority. That the uplink data is sent by using the transmission format and the transmission resources in the transmission format is described in detail in the following several cases.
  • the user equipment when there is one uplink data packet on the LCH corresponding to the target transmission class, the user equipment sends the uplink data packet in a transmission format corresponding to the target transmission class, and transmission resources in the transmission format.
  • the user equipment when there are a plurality of uplink data packets on the LCH corresponding to the target transmission class, the user equipment preferentially allocates more transmission resources to an uplink data packet with a high priority in the plurality of uplink data packets.
  • the priority may be at least one of: a reliability class, a delay class, and a service priority.
  • the plurality of uplink data packets include an uplink data packet 1 , an uplink data packet 2 , and an uplink data packet 3 .
  • a service priority of the uplink data packet 1 is 2
  • a service priority of the uplink data packet 2 is 3
  • a service priority of the uplink data packet 3 is 5. It is set that a smaller value of a service priority indicates a higher service priority.
  • the user equipment preferentially allocates, to the uplink data packet 1 , the transmission resources in the transmission format corresponding to the target transmission class.
  • the user equipment when there are a plurality of uplink data packets on the LCH corresponding to the target transmission class, the user equipment allocates a preset proportion of transmission resources to each of the plurality of uplink data packets.
  • the user equipment may continue to allocate the remaining resources. For example, the user equipment preferentially allocates more transmission resources to an uplink data packet with a high priority in unsent uplink data packets in the plurality of uplink data packets.
  • the plurality of uplink data packets include an uplink data packet 1 , an uplink data packet 2 , and an uplink data packet 3 .
  • a service priority of the uplink data packet 1 is 2
  • a service priority of the uplink data packet 2 is 3, and a service priority of the uplink data packet 3 is 5. It is set that a smaller value of a service priority indicates a higher service priority. If transmission resources corresponding to the target transmission class that are received by the user equipment are 100 Kbytes, the user equipment may allocate 20 Kbytes to the uplink data packet 1 , allocate 15 Kbytes to the uplink data packet 2 , and allocate 15 Kbytes to the uplink data packet 3 , and there are still 50 Kbytes remaining after transmission resources are allocated to each uplink data packet.
  • the user equipment preferentially allocates resources to the uplink data packet 1 with a high priority. After a resource requirement of the uplink data packet 1 is met, the user equipment starts to allocate resources to the uplink data packet 2 in a priority sequence, for example, continues to allocate 40 Kbytes to the uplink data packet 1 , and allocate 10 Kbytes to the uplink data packet 2 .
  • the user equipment determines that the third information includes transmission formats used for uplink data on LCHs corresponding to at least two transmission classes, and transmission resources in the transmission formats, where it is assumed that the third information includes first transmission resources of a first transmission class and second transmission resources of a second transmission class, after the user equipment allocates the first transmission resources to uplink data packets on an LCH of the first transmission class, when the first transmission resources have remaining resources, the user equipment may first allocate the remaining resources in the first transmission resources to uplink data packets on an LCH of the second transmission class.
  • the user equipment may preferably use unused transmission resources in the first transmission resources.
  • the first transmission resources may use a shorter TTI and a shorter HARQ round trip time (RTT) than the second transmission resources, to implement a larger quantity of retransmissions during a same time, thereby improving transmission robustness.
  • RTT round trip time
  • a lower-order MCS may alternatively be used to improve transmission robustness and decrease a bit error rate.
  • high-class transmission resources may be preferably used to transmit the uplink data packet of the lower transmission class. This reduces waste of the high-class transmission resources.
  • the user equipment first transmits, on the unused transmission resources in the first transmission resources, some of the uplink data packets on the LCH of the second transmission class, and then uses the second transmission resources to send a remaining uplink data packet in the uplink data packets on the LCH of the second transmission class.
  • an uplink data packet that is on the LCH of the first transmission class and to which transmission resources are not allocated continues to be reserved in a buffer and waits for allocation of transmission resources in next first transmission resources provided by the radio access device.
  • a service of a transmission class may use transmission resources of a transmission class higher than the transmission class of the service, so as to increase a transmission speed, and reduce a transmission delay.
  • the user equipment When discarding a target data packet in the uplink data, the user equipment notifies, by using an RLC layer, an RLC layer of the radio access device of an identifier of the target data packet.
  • the target logical channel is a logical channel in the at least one logical channel
  • the target data packet is any one of the plurality of uplink data packets.
  • a packet data convergence protocol (PDCP) layer entity of the user equipment sets a timer for the target data packet, and if the timer expires, the target data packet may be discarded.
  • the PDCP layer entity of the user equipment notifies a radio link control (RLC) layer entity of an identifier of the discarded uplink data packet, and the identifier is a serial number (SN) of a PDCP PDU.
  • the RLC layer entity of the user equipment notifies an RLC layer entity of the radio access device of the identifier of the uplink data packet, and the identifier is an RLC PDU SN.
  • the RLC layer entity may continue to use an SN allocated by the PDCP layer entity.
  • the user equipment discards the target data packet in the RLC layer entity, and notifies, by using the RLC layer entity, an RLC layer entity of the radio access device of an identifier of the uplink data packet.
  • the identifier is an RLC PDU SN.
  • the RLC layer entity of the radio access device may be notified by using an RLC control PDU.
  • the user equipment discards the target data packet in the MAC layer entity.
  • the MAC layer entity notifies an RLC layer of an identifier of the discarded uplink data packet, and notifies, by using an RLC layer entity, an RLC layer entity of the radio access device of the identifier of the uplink data packet.
  • the identifier is an RLC PDU SN.
  • the RLC layer entity of the user equipment after notifying the RLC layer entity of the radio access device of the identifier of the discarded uplink data packet, the RLC layer entity of the user equipment further moves a sending window to send a data packet following the discarded target data packet.
  • step 208 describes a case in which for the target data packet in the uplink data, the user equipment sends the identifier of the discarded target data packet to the radio access device.
  • downlink data namely, data sent by the radio access network device to the user equipment
  • a transmit end and a receive end are used for description.
  • the radio access device is the receive end.
  • the radio access device is the transmit end. After receiving an identifier of a discarded target data packet, the receive end no longer waits to receive the target data packet discarded by the transmit end, and the receive end modifies a receiving window and continues to receive a subsequent data packet.
  • an RLC AM mode in a solution to notifying the identifier of the discarded target data packet, when an RLC entity of the receive end has a target data packet that is not received in the receiving window, the RLC entity of the receive end does not keep waiting. In this case, the receiving window of the receive end is moved, so as to ensure that a subsequent data packet can be sent and received. After the transmit end sends the identifier of the discarded target data packet, the RLC layer entity of the transmit end moves a sending window to send a data packet following the discarded target data packet.
  • the timer is configured by the radio access network device, and timers of different protocol layers are configured for an LCH in the user equipment, including at least one of: a PDCP layer, an RLC layer, and a MAC layer.
  • a timer of the protocol layer is started when a data packet enters the protocol layer.
  • different timers may be set for different data packets of a same service.
  • a video service includes an intra-prediction (I) frame and a prediction (P) frame.
  • the I frame represents a key frame, and when data in the I frame is decoded, only the data in the I frame is required to reconstruct a complete image.
  • the P frame represents a difference between a current frame and a previous frame (for example, the previous frame is the I frame or the P frame), and when the P frame is decoded, data in the previous frame and data in the current frame that are buffered need to be used to reconstruct a complete image.
  • different timers may be set for the I frame and the P frame. For example, a timer with relatively long duration is set for the I frame, and a timer with relatively short duration is set for the P frame.
  • the core network device or the radio access network device may notify the user equipment of a value of the timer.
  • a timer may be started when processing of a previous type of data packet in the same service is completed at a protocol layer. For example, after processing in the I frame at the RLC layer is completed, timers for all P frames between the I frame and a next I frame are started. If the timer expires, all the P frames between the I frame and the next I frame are discarded.
  • This solution may be used for a service in which RLC uses an acknowledged mode (AM) or an unacknowledged mode (UM).
  • AM acknowledged mode
  • UM unacknowledged mode
  • the receive end may send retransmission information to a transmit end.
  • the retransmission information includes a serial number of a packet that needs to be retransmitted, and the transmit end is required to retransmit the packet.
  • the implementation solution may be used for an uplink data packet and a downlink data packet.
  • the RLC layer entity of the radio access device For the downlink data packet, notifies the RLC layer entity of the user equipment of the identifier of the discarded uplink data packet.
  • the user equipment may further determine a resource allocation sequence for the uplink data based on a service priority and a reliability class of the uplink data.
  • the user equipment may allocate the resources first based on a service priority and then based on a transmission class.
  • a service priority is 2
  • a transmission class is 2
  • prioritized bits are 20 kbytes
  • a service priority is 1, a transmission class is 3, and a prioritized bit rate are 20 kbytes. It is set that a smaller value of a service priority indicates a higher service priority.
  • the transmission resources are scheduled in a service priority sequence. First, transmission resources corresponding to the transmission class 3 are allocated to the uplink data packet 2 , and 20 Kbytes are allocated to the uplink data packet 2 .
  • transmission resources corresponding to the transmission class 2 are allocated to the uplink data packet 1 , and 10 kbytes are allocated to the uplink data packet 1 .
  • the transmission resources corresponding to the transmission class 3 are selected for remaining data in the uplink data packet 2 . If the transmission resources corresponding to the transmission class 3 are insufficient, the transmission resources corresponding to the transmission class 2 may be selected. If the uplink data packet 1 still has remaining data, transmission resources are allocated to the remaining data during next scheduling.
  • resources may be allocated based on first a transmission class and then a service priority. For example, for an uplink data packet 1 , a service priority is 2, a transmission class is 2, and a prioritized bit rate are 10 kbytes; and for an uplink data packet 2 , a service priority is 1, a transmission class is 3, and a prioritized bit rate are 20 kbytes. It is set that a smaller value of a service priority indicates a higher service priority.
  • the transmission resources are allocated in a transmission class sequence. First, transmission resources corresponding to the transmission class 2 are allocated to the uplink data packet 1 , and 10 Kbytes are allocated to the uplink data packet 1 .
  • transmission resources corresponding to the transmission class 3 are allocated to the uplink data packet 2 , and 20 Kbytes are allocated to the uplink data packet 2 .
  • the transmission resources corresponding to the transmission class 2 are selected for remaining data in the uplink data packet 1 . If the transmission resources corresponding to the transmission class 2 are insufficient, transmission resources are allocated to the remaining data during next scheduling. If the uplink data packet 2 still has remaining data, transmission resources are allocated to the remaining data during next scheduling.
  • the user equipment determines a resource allocation sequence based on the transmission class, and completes allocation in the resource allocation sequence.
  • a transmission class is 2 and a prioritized bit rate are 10 kbytes; and for an uplink data packet 2 on the second LCH, a transmission class is 3 and a prioritized bit rate are 20 kbytes.
  • a sequence in which the user equipment allocates resources to the uplink data packet 1 and the uplink data packet 2 is the uplink data packet 1 first and then the uplink data packet 2 .
  • resources are allocated to the uplink data packet 1 .
  • Transmission resources corresponding to the transmission class 2 are selected, and 10 Kbytes are allocated to the uplink data packet 1 .
  • resources are allocated to the uplink data packet 2 .
  • Transmission resources corresponding to the transmission class 3 are selected, and 20 Kbytes are allocated to the uplink data packet 2 .
  • the transmission resources corresponding to the transmission class 2 are selected for remaining data in the uplink data packet 1 . If the transmission resources corresponding to the transmission class 2 are insufficient, transmission resources are allocated to the remaining data during next scheduling. If the remaining transmission resources of the transmission class 2 have remaining resources, the remaining resources may be allocated to the uplink data packet 2 . If the uplink data packet 2 still has remaining data, transmission resources are allocated to the remaining data during next scheduling.
  • different logical channels in the user equipment are corresponding to different transmission classes.
  • the user equipment transmits the uplink data by using a transmission format used for the uplink data on the logical channel corresponding to the transmission class, and transmission resources in the transmission format.
  • the transmission class includes at least one of: a reliability class and a delay class of the service, and optionally may further include a service priority; or the transmission class is determined based on at least two of a service priority, a reliability class, and a delay class of a service.
  • transmission resources used for uplink data that are determined based on transmission classes implement that different transmission resources are allocated to uplink data on LCHs of different transmission classes, and can meet different requirements of different uplink data, thereby improving data transmission flexibility, improving user experience, and increasing network resource utilization.
  • FIG. 4 is a schematic flowchart of another data transmission method according to an embodiment of this application.
  • the data transmission method in this embodiment of this application includes step 301 to step 308 .
  • the data transmission method in this embodiment of this application is performed through interaction between user equipment and a radio access device.
  • a transmission class is a transmission class of a service sent by the user equipment.
  • the radio access device sends first information to the user equipment, where the first information indicates a transmission class of a service supported by the user equipment.
  • the first information notifies the user equipment of the transmission class of the service supported by the user equipment.
  • the transmission class includes at least one of: a reliability class and a delay class of the service, and optionally may further include a service priority.
  • the transmission class is determined based on at least two of a service priority, a reliability class, and a delay class of the service; or the transmission class is determined based on at least two of parameters such as a priority, a reliability requirement, and a delay requirement of the service.
  • the reliability class of the service is a requirement class of the service for transmission reliability.
  • the delay class of the service is a requirement class of the service for a transmission delay.
  • the transmission delay is a transmission time for transmitting a service packet from the user equipment to a core network device, or the transmission delay is a transmission time for transmitting a service packet from the user equipment to the radio access device.
  • the transmission delay may be determined by subtracting an estimated transmission time for transmitting the service packet from the radio access device to the core network device from the transmission time for transmitting the service packet from the user equipment to the core network device.
  • the service priority is a relative class for scheduling a service packet.
  • determining the transmission class based on the reliability class of the service and the delay class of the service is generating a transmission class based on the reliability class and the delay class of the service.
  • the transmission class may be obtained in a weighting manner of performing a weighting operation on the reliability class and the delay class. If the reliability class is 1, the delay class is 2, and weighting coefficients are respectively 40% and 60%, a transmission class value is 1.6.
  • the transmission class may be generated by using a pre-configured relationship between a transmission class and each of a reliability class and a delay class. If the reliability class is 1, and the delay class is 2, the transmission class obtained based on the pre-configured relationship is 3.
  • different transmission classes of a plurality of services may be transmitted for a plurality of times.
  • a transmission class of one service is sent at a time, or transmission classes of at least two services are sent at a time.
  • the radio access device may send the different transmission classes of the plurality of services for a plurality of times.
  • the first information may include a transmission class of one or more services.
  • a relationship between a logical channel and a transmission class of the service supported by the user equipment is shown in Table 2.
  • One logical channel in a logical channel group bears at least one service, and services on this logical channel may be corresponding to different transmission classes.
  • the service in this embodiment of this application may be a group of data flows (QoS flow) having a same QoS parameter.
  • a transmission class of a service may be determined based on each class parameter of the service by using a method the same as a method for determining, based on each class parameter of a service, a transmission class of an LCH on which uplink data of the service is located. Therefore, for a specific calculation manner in which the transmission class of the service is determined based on each class parameter of the service, refer to specific descriptions in the embodiment shown in FIG. 3 . Details are not described herein again.
  • the first information sent by the radio access device to the user equipment is a service identifier and a transmission class corresponding to the service identifier.
  • the service identifier may be a TFT or a flow ID that is corresponding to a service, or a QoS identifier of a service.
  • there are three transmission classes such as a high class, a medium class, and a low class. If a value is used to represent a transmission class, the transmission class sent by the radio access device may be represented by setting a value, for example, 1, 2, 3, . . . , N, where 1 represents a highest class, and N represents a lowest class.
  • the radio access device or the core network may directly send a service identifier and a transmission class corresponding to the service identifier, to notify the user equipment of a transmission class of each service.
  • the radio access device when the radio access device sends a QoS parameter of a service to the user equipment, the first information sent by the radio access device to the user equipment is a service identifier of uplink data and a QoS parameter corresponding to the service identifier of the uplink data.
  • the user equipment After receiving the service identifier of the uplink data and the QoS parameter corresponding to the service identifier of the uplink data that are sent by the radio access device, the user equipment determines, based on a table of a mapping relationship between a QoS parameter and a transmission class, a transmission class corresponding to a service indicated by the service identifier.
  • the core network device notifies the radio access device of the QoS.
  • the radio access device may preset the table of the mapping relationship between a QoS parameter and a transmission class, and notify the user equipment of the mapping relationship table, so that the user equipment determines a transmission class of each service by using the table of the mapping relationship between a QoS parameter and a transmission class.
  • the QoS parameter includes one or more of parameters such as a priority, a packet loss rate, a transmission delay, and a rate.
  • the radio access device when the radio access device sends a QoS parameter of a service to the user equipment, and a QoS parameter of uplink data of the service is the same as a QoS parameter of downlink data, the first information sent by the radio access device to the user equipment is a service identifier of the downlink data and a QoS parameter corresponding to the service identifier of the downlink data.
  • the user equipment After receiving the service identifier of the downlink data and the QoS parameter corresponding to the service identifier of the downlink data, the user equipment first obtains an IP 5-tuple of the downlink data of the service, and obtains an IP 5-tuple of the uplink data of the service by inverting IP 5-tuple information of the downlink data.
  • the IP 5-tuple includes a source IP address, a source port, a destination IP address, a destination port, and a transport layer protocol.
  • An inversion function may be implemented by inverting the source
  • the user equipment associates an inverted IP 5-tuple with a service identifier of the uplink data of the service, and the identifier of the uplink data is the same as the identifier of the downlink data. Finally, the user equipment determines the QoS parameter corresponding to the service identifier of the downlink data as the QoS parameter corresponding to the service identifier of the uplink data.
  • the user equipment may reference the second feasible solution to determine, based on the table of the mapping relationship between a QoS parameter and a transmission class, a transmission class corresponding to the service indicated by the service identifier.
  • the user equipment may determine a transmission class based on an indication identifier in to-be-transmitted uplink data. Specifically, the user equipment obtains an indication identifier of uplink data at an application layer, and determines, based on a table of a mapping relationship between an indication identifier and a transmission class, a transmission class corresponding to the uplink data. The radio access device presets the table of the mapping relationship between an indication identifier and a transmission class, and notifies the user equipment of the mapping relationship table. In step 301 , the first information may be the table of the mapping relationship between an indication identifier and a transmission class.
  • the first information may further include a parameter of PBR resources of a service.
  • the user equipment receives the first information sent by the radio access device.
  • the user equipment sends second information to the radio access device.
  • the second information indicates amounts of to-be-sent uplink data of services of a plurality of transmission classes.
  • to-be-sent uplink data in the user equipment needs to be transmitted through an LCH, and one LCH may transmit uplink data of one service or uplink data of a plurality of services.
  • a transmission class of a service packet in this embodiment of this application is a transmission class of an LCH on which the service packet is located; or if all uplink data on one LCH is corresponding to a plurality of transmission classes, the second information is sent to the radio access device based on uplink data of different transmission classes in this embodiment of this application.
  • the user equipment may further perform step 302 , that is, the user equipment receives fourth information sent by the radio access device. Details are as follows.
  • the fourth information is used to instruct the user equipment to report a transmission class of a service having an amount of to-be-sent uplink data.
  • the fourth information may be used to instruct the user equipment to report the amount of to-be-sent uplink data based on a transmission class.
  • the user equipment separately collects statistics about amounts of to-be-sent uplink data of services of transmission classes in the user equipment.
  • the second information sent by the user equipment may include a plurality of transmission classes and an amount of to-be-sent uplink data of each transmission class.
  • the fourth information may be used to instruct to report a target transmission class of an amount of to-be-sent uplink data, for example, instruct the user equipment to report amounts of to-be-sent uplink data of services of several transmission classes.
  • the user equipment collects statistics about amounts of to-be-sent uplink data of the transmission classes that are notified by the user equipment.
  • the second information sent by the user equipment includes the amounts of to-be-sent uplink data of the transmission classes, and optionally may further include the transmission classes.
  • the fourth information indicates a first location index of each transmission class in the at least one transmission class, and the first location index is used to identify a location, in the second information, of an amount of to-be-sent uplink data of a service of each transmission class in the at least one transmission class.
  • the user equipment determines, based on a correspondence between a location index and a transmission class, a first transmission class corresponding to the first location index, and then collects statistics about amounts of to-be-sent uplink data of the first transmission class in the user equipment. In this way, the amounts of to-be-sent uplink data are written at a location that is corresponding to the first location index and that is in the second information sent by the user equipment.
  • a transmission class of a service is represented in a manner in which the radio access device configures a location index for the user equipment.
  • different location indexes represent different transmission classes. Therefore, after receiving the fourth information, the user equipment collects statistics about amounts of to-be-sent uplink data based on the first location index and reports the amounts of to-be-sent uplink data based on the first location index, and writes the amounts of to-be-sent uplink data at the location that is corresponding to the first location index and that is in the second information.
  • the radio access device receives the second information.
  • the radio access device may obtain amounts of to-be-sent uplink data of services of different transmission classes based on the received second information.
  • the radio access device determines a transmission format used for uplink data of a service of at least one transmission class and determines transmission resources in the transmission format.
  • the radio access device After receiving the second information, the radio access device searches available transmission resources for transmission resources corresponding to a transmission class determined based on the second information.
  • the radio access device may receive second information indicating a plurality of transmission classes of a plurality of user equipments.
  • the radio network device comprehensively considers factors such as a total quantity of currently unused transmission resources and a quantity of transmission resources required by each user equipment, to allocate a specific quantity of transmission resources to the transmission class indicated in the second information of the user equipment in this embodiment.
  • the radio access device may allocate a specific quantity of transmission resources to a service corresponding to each transmission class indicated in the second information, or allocate a specific quantity of transmission resources to services corresponding to several transmission classes in the plurality of transmission classes indicated in the second information.
  • the transmission format may include but is not limited to a TTI format, an MCS format, a HARQ configuration, an MIMO configuration, beam resources, and a Numerology.
  • the Numerology means that configuration parameters used for OFDM are different at a physical layer.
  • the configuration parameters are different in terms of at least one of: a subcarrier spacing and a guard prefix length.
  • time-frequency resources included in an RE are different from time-frequency resources included in an RB.
  • the radio access device sends third information to the user equipment, where the third information indicates the transmission format used for the uplink data of the service of the at least one transmission class and indicates the transmission resources in the transmission format.
  • step 305 refers to detailed descriptions of step 205 in the embodiment shown in FIG. 3 . Details are not described herein again.
  • the user equipment determines the transmission format of the uplink data of the service of the at least one transmission class in the different transmission classes, and determines the transmission resources in the transmission format.
  • step 306 refer to detailed descriptions of step 206 in the embodiment shown in FIG. 3 . Details are not described herein again.
  • the user equipment sends the uplink data by using the transmission format and the transmission resources in the transmission format.
  • any transmission class in the at least one transmission class is a target transmission class
  • uplink data of a service corresponding to the target transmission class is a plurality of uplink data packets.
  • the target transmission class may be corresponding to one service, or may be corresponding to a plurality of services.
  • the plurality of uplink data packets may be related to one service, or may be related to a plurality of services.
  • the uplink data packet also has at least one of: a corresponding reliability class, delay class, and service priority. That the uplink data is sent by using the transmission format and the transmission resources in the transmission format is described in detail in the following several cases.
  • the user equipment when there is one uplink data packet in the service corresponding to the target transmission class, the user equipment sends the uplink data packet in a transmission format corresponding to the target transmission class, and transmission resources in the transmission format.
  • the user equipment when there are a plurality of uplink data packets in the service corresponding to the target transmission class, the user equipment preferentially allocates more transmission resources to an uplink data packet with a high priority in the plurality of uplink data packets.
  • the priority may be at least one of: a reliability class, a delay class, and a service priority.
  • the plurality of uplink data packets include an uplink data packet 1 , an uplink data packet 2 , and an uplink data packet 3 .
  • a service priority of the uplink data packet 1 is 2
  • a service priority of the uplink data packet 2 is 3
  • a service priority of the uplink data packet 3 is 5. It is set that a smaller value of a service priority indicates a higher service priority.
  • the user equipment preferentially allocates, to the uplink data packet 1 , the transmission resources in the transmission format corresponding to the target transmission class.
  • the user equipment when there are a plurality of uplink data packets in the service corresponding to the target transmission class, the user equipment allocates a preset proportion of transmission resources to each of the plurality of uplink data packets.
  • the user equipment may continue to allocate the remaining resources. For example, the user equipment preferentially allocates more transmission resources to an uplink data packet with a high priority in unsent uplink data packets in the plurality of uplink data packets.
  • the plurality of uplink data packets include an uplink data packet 1 , an uplink data packet 2 , and an uplink data packet 3 .
  • a service priority of the uplink data packet 1 is 2
  • a service priority of the uplink data packet 2 is 3, and a service priority of the uplink data packet 3 is 5. It is set that a smaller value of a service priority indicates a higher service priority. If transmission resources corresponding to the target transmission class that are received by the user equipment are 100 Kbytes, the user equipment may allocate 20 Kbytes to the uplink data packet 1 , allocate 15 Kbytes to the uplink data packet 2 , and allocate 15 Kbytes to the uplink data packet 3 , and there are still 50 Kbytes remaining after transmission resources are allocated to each uplink data packet.
  • the user equipment preferentially allocates resources to the uplink data packet 1 with a high priority. After a resource requirement of the uplink data packet 1 is met, the user equipment starts to allocate resources to the uplink data packet 2 in a priority sequence, for example, continues to allocate 40 Kbytes to the uplink data packet 1 , and allocate 10 Kbytes to the service 2 .
  • the user equipment determines that the third information includes transmission formats used for uplink data of services corresponding to at least two transmission classes, and transmission resources in the transmission formats, where it is assumed that the third information includes first transmission resources of a first transmission class and second transmission resources of a second transmission class, after the user equipment allocates the first transmission resources to uplink data packets of a service of the first transmission class, when the first transmission resources have remaining resources, the user equipment may first allocate the remaining resources in the first transmission resources to uplink data packets of a service of the second transmission class.
  • the user equipment may preferably use unused transmission resources in the first transmission resources.
  • the first transmission resources may use a shorter TTI and a shorter HARQ round trip time than the second transmission resources, to implement a larger quantity of retransmissions during a same time, thereby improving transmission robustness.
  • a lower-order MCS may alternatively be used to improve transmission robustness and decrease a bit error rate.
  • high-class transmission resources may be preferably used to transmit the uplink data packet of the lower transmission class. This reduces waste of the high-class transmission resources.
  • the user equipment first transmits, on the unused transmission resources in the first transmission resources, some of the uplink data packets of the service of the second transmission class, and then uses the second transmission resources to send a remaining uplink data packet in the uplink data packets of the service of the second transmission class.
  • an uplink data packet that is of the service of the first transmission class and to which transmission resources are not allocated continues to be reserved in a buffer and waits for allocation of transmission resources in next first transmission resources provided by the radio access device.
  • a service of a transmission class may use transmission resources of a transmission class higher than the transmission class of the service, so as to increase a transmission speed, and reduce a transmission delay.
  • the user equipment When discarding a target data packet in the uplink data, the user equipment notifies, by using an RLC layer, an RLC layer of the radio access device of an identifier of the target data packet.
  • the target service is any one of the at least one service
  • the target data packet is any one of the plurality of uplink data packets.
  • step 308 refer to detailed descriptions of step 208 in the embodiment shown in FIG. 3 . Details are not described herein again.
  • the user equipment may further determine a resource allocation sequence for the uplink data based on a service priority and a reliability class of the uplink data.
  • the user equipment may allocate the resources first based on a service priority and then based on a transmission class.
  • a service priority is 2
  • a transmission class is 2
  • prioritized bits are 20 kbytes
  • a transmission class is 3
  • a prioritized bit rate are 20 kbytes. It is set that a smaller value of a service priority indicates a higher service priority.
  • the transmission resources are scheduled in a service priority sequence. First, transmission resources corresponding to the transmission class 3 are allocated to the uplink data packet 2 , and 20 Kbytes are allocated to the uplink data packet 2 .
  • transmission resources corresponding to the transmission class 2 are allocated to the uplink data packet 1 , and 10 kbytes are allocated to the uplink data packet 1 .
  • the transmission resources corresponding to the transmission class 3 are selected for remaining data in the uplink data packet 2 . If the transmission resources corresponding to the transmission class 3 are insufficient, the transmission resources corresponding to the transmission class 2 may be selected. If the uplink data packet 1 still has remaining data, transmission resources are allocated to the remaining data during next scheduling.
  • resources may be allocated based on first a transmission class and then a service priority. For example, for an uplink data packet 1 , a service priority is 2, a transmission class is 2, and a prioritized bit rate are 10 kbytes; and for an uplink data packet 2 , a service priority is 1, a transmission class is 3, and a prioritized bit rate are 20 kbytes. It is set that a smaller value of a service priority indicates a higher service priority.
  • the transmission resources are allocated in a transmission class sequence. First, transmission resources corresponding to the transmission class 2 are allocated to the uplink data packet 1 , and 10 Kbytes are allocated to the uplink data packet 1 .
  • transmission resources corresponding to the transmission class 3 are allocated to the uplink data packet 2 , and 20 Kbytes are allocated to the uplink data packet 2 .
  • the transmission resources corresponding to the transmission class 2 are selected for remaining data in the uplink data packet 1 . If the transmission resources corresponding to the transmission class 2 are insufficient, transmission resources are allocated to the remaining data during next scheduling. If the uplink data packet 2 still has remaining data, transmission resources are allocated to the remaining data during next scheduling.
  • the user equipment determines a resource allocation sequence based on the transmission class, and completes allocation in the resource allocation sequence.
  • a transmission class is 2 and a prioritized bit rate are 10 kbytes; and for an uplink data packet 2 of the second service, a transmission class is 3 and a prioritized bit rate are 20 kbytes.
  • a sequence in which the user equipment allocates resources to the uplink data packet 1 and the uplink data packet 2 is the uplink data packet 1 first and then the uplink data packet 2 .
  • resources are allocated to the uplink data packet 1 .
  • Transmission resources corresponding to the transmission class 2 are selected, and 10 Kbytes are allocated to the uplink data packet 1 .
  • resources are allocated to the uplink data packet 2 .
  • Transmission resources corresponding to the transmission class 3 are selected, and 20 Kbytes are allocated to the uplink data packet 2 .
  • the transmission resources corresponding to the transmission class 2 are selected for remaining data in the uplink data packet 1 . If the transmission resources corresponding to the transmission class 2 are insufficient, transmission resources are allocated to the remaining data during next scheduling. If the remaining transmission resources of the transmission class 2 have remaining resources, the remaining resources may be allocated to the uplink data packet 2 . If the uplink data packet 2 still has remaining data, transmission resources are allocated to the remaining data during next scheduling.
  • different services in the user equipment are corresponding to different transmission classes.
  • a user equipment transmits the uplink data by using a transmission format used for the uplink data of the service corresponding to the transmission class, and transmission resources in the transmission format.
  • the transmission class includes at least one of: a reliability class and a delay class of the service, and optionally may further include a service priority; or the transmission class is determined based on at least two of a service priority, a reliability class, and a delay class of a service. Therefore, transmission resources used for uplink data that are determined based on transmission classes implement that different transmission resources are allocated to uplink data of services of different transmission classes, and can meet different requirements of different uplink data, thereby improving data transmission flexibility, improving user experience, and increasing network resource utilization.
  • the radio access device may indicate a logical channel on which services of a same transmission class of the user equipment are borne (in this case, one logical channel is corresponding to one type of transmission class, and different services may have a same transmission class).
  • the radio access device may indicate that different services of the user equipment have different transmission classes, and the services of the different transmission classes may be borne on a same logical channel.
  • the first information may include content in both Table 1 and Table 2, as shown in Table 3.
  • FIG. 5 is a schematic modular diagram of user equipment according to an embodiment of this application.
  • the user equipment in this embodiment of this application may be the user equipment described in any of the method embodiments shown in FIG. 2 and FIG. 3 . Therefore, repeated content in any of the method embodiments shown in FIG. 2 to FIG. 4 may not be described again in this embodiment.
  • user equipment 1 in this embodiment of this application may include a receiving unit 11 , a determining unit 12 , and a sending unit 13 .
  • the user equipment 1 further includes an allocation unit 14 .
  • the receiving unit 11 is configured to receive first information sent by a radio access device.
  • the first information indicates different transmission classes corresponding to a plurality of logical channels.
  • the determining unit 12 is configured to determine, based on the first information received by the receiving unit 11 , a transmission format of uplink data on at least one logical channel corresponding to at least one transmission class in the different transmission classes, and determine transmission resources in the transmission format.
  • the sending unit 13 is configured to send the uplink data by using the transmission format and the transmission resources in the transmission format that are determined by the determining unit 12 .
  • the sending unit 13 is further configured to send second information to the radio access network device.
  • the second information indicates an amount of the to-be-sent uplink data on the at least one logical channel corresponding to the at least one transmission class in the different transmission classes.
  • the receiving unit 11 is further configured to: after the sending unit 13 sends the second information to the radio access device, receive third information sent by the radio access device.
  • the third information indicates the transmission format used for the uplink data on the at least one logical channel corresponding to the at least one transmission class in the different transmission classes, and indicates the transmission resources in the transmission format.
  • the at least one transmission class comprises all transmission classes in the different transmission classes.
  • the at least one transmission class is a transmission class indicated by the radio access device in the different transmission classes.
  • the receiving unit 11 is further configured to: before the sending unit 13 sends the second information, receive fourth information sent by the radio access device.
  • the fourth information indicates a first location index of each transmission class in the at least one transmission class, and the first location index is used to identify a location, in the second information, of an amount of to-be-sent uplink data of each transmission class in the at least one transmission class.
  • each transmission class in the at least one transmission class in the third information is indicated in an explicit manner or an implicit manner.
  • each transmission class in the at least one transmission class is indicated in the third information in an explicit manner is as follows:
  • the third information carries each transmission class in the at least one transmission class, a transmission format corresponding to each transmission class, and transmission resources in the transmission format corresponding to the transmission class.
  • each transmission class in the at least one transmission class is implicitly indicated in the third information is as follows:
  • the third information includes a transmission format corresponding to each transmission class in the at least one transmission class, and includes transmission resources in the transmission format corresponding to the transmission class.
  • Each transmission class is indicated by using a second location index corresponding to the transmission class, and the second location index is used to identify the transmission format corresponding to each transmission class in the at least one transmission class and a location, in the third information, of the transmission resources in the transmission format corresponding to the transmission class; or
  • each transmission class is indicated by using a format of transmission resources corresponding to the transmission class
  • the third information includes the transmission format corresponding to each transmission class in the at least one transmission class, and includes the transmission resources in the transmission format corresponding to the transmission class.
  • uplink data on each logical channel in the at least one logical channel is a plurality of uplink data packets
  • the user equipment further includes:
  • an allocation unit 14 configured to: in a process of sending a plurality of uplink data packets, preferentially allocate more transmission resources to an uplink data packet with a high priority in the plurality of uplink data packets.
  • the allocation unit 14 is further configured to allocate a preset proportion of transmission resources to each of the plurality of uplink data packets before preferentially allocating more transmission resources to the uplink data packet with a high service priority in the plurality of uplink data packets.
  • the target logical channel is a logical channel in the at least one logical channel
  • the sending unit 13 is further configured to: if a timer, at a PDCP layer, of a target data packet in the uplink data expires, discard the target data packet at the PDCP layer; and notify, by using an RLC layer, an RLC layer of the radio access device of an identifier of the target data packet.
  • the sending unit 13 is further configured to: if a timer, at an RLC layer, of a target data packet in the uplink data expires, discard the target data packet at the RLC layer; and notify, by using the RLC layer, an RLC layer of the radio access device of an identifier of the target data packet.
  • the sending unit 13 is further configured to: if a timer, at a MAC layer, of a target data packet in the uplink data expires, discard the target data packet at the MAC layer; and notify, by using an RLC layer, an RLC layer of the radio access device of an identifier of the target data packet.
  • FIG. 6 is a schematic structural diagram of user equipment according to an embodiment of this application.
  • User equipment 1000 shown in FIG. 6 includes a processor 1001 and a transceiver 1004 .
  • the processor 1001 and the transceiver 1004 are connected, for example, connected by using a bus 1002 .
  • the user equipment 1000 may further include a memory 1003 . It should be noted that there is at least one transceiver 1004 in actual application, and a structure of the user equipment 1000 constitutes no limitation on this embodiment of this application.
  • the processor 1001 is applied to this embodiment of this application, and is configured to implement functions of the determining unit 12 and the allocation unit 14 shown in FIG. 5 .
  • the transceiver 1004 includes a receiver and a transmitter. The transceiver 1004 is applied to this embodiment of this application, and is configured to implement functions of the receiving unit 11 and the sending unit 13 shown in FIG. 5 .
  • the processor 1001 may be a central processing unit (CPU), a general purpose processor, digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable logic gate array (FPGA) or another programmable logic device, a transistor logic device, a hardware component, or any combination thereof.
  • the processor 1001 may implement or execute various example logical blocks, modules, and circuits described with reference to content disclosed in this application.
  • the processor 1001 may be a combination of processors implementing a computing function, for example, a combination of one or more microprocessors, or a combination of a DSP and a microprocessor, and the like.
  • the bus 1002 may include a channel, used to transmit information between the foregoing components.
  • the bus 1002 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, or the like.
  • the bus 1002 may be classified into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is used to represent the bus in FIG. 6 , but this does not mean that there is only one bus or only one type of bus.
  • the memory 1003 may be a read-only memory (ROM) or another type of static storage device that can store static information and instructions, or a random access memory (RAM) or another type of dynamic storage device that can store information and instructions; or may be an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or another compact disk storage, an optical disc storage (including a compact optical disc, a laser disc, an optical disc, a digital versatile disc, a Blu-ray disc, or the like), a magnetic disk storage medium or another magnetic storage device, or any other medium that can be configured to carry or store expected program code in a form of an instruction or a data structure and that can be accessed by a computer.
  • ROM read-only memory
  • RAM random access memory
  • EEPROM electrically erasable programmable read-only memory
  • CD-ROM compact disc read-only memory
  • CD-ROM compact disc read-only memory
  • optical disc storage including a compact optical disc, a laser disc, an optical
  • the memory 1003 is configured to store application program code for executing the solutions of this application, and the processor 1001 controls execution of the solutions of this application.
  • the processor 1001 is configured to execute the application program code stored in the memory 1003 , to implement actions of the user equipment provided in any of the embodiments shown in FIG. 2 to FIG. 4 .
  • An embodiment of this application further provides a computer storage medium, configured to store a computer software instruction used by the user equipment, and the computer software instruction includes a program designed for the user equipment to perform the foregoing aspects.
  • FIG. 7 is a schematic modular diagram of a radio access device according to an embodiment of this application.
  • the radio access device in this embodiment of this application may be the radio access device described in any of the method embodiments shown in FIG. 2 and FIG. 3 . Therefore, repeated content in any of the method embodiments shown in FIG. 2 and FIG. 3 may not be described again in this embodiment.
  • a radio access device 2 in this embodiment of this application may include a sending unit 21 and a receiving unit 22 .
  • the sending unit 21 is configured to send first information to user equipment.
  • the first information indicates different transmission classes corresponding to a plurality of logical channels.
  • the first information is used by the user equipment to determine a transmission format of uplink data on at least one logical channel corresponding to at least one transmission class in the different transmission classes, and determine transmission resources in the transmission format.
  • the radio access device 2 further includes:
  • a receiving unit 22 configured to: after the sending unit 21 sends the first information, receive second information sent by the user equipment, where the second information indicates an amount of the to-be-sent uplink data on the at least one logical channel corresponding to the at least one transmission class in the different transmission classes.
  • the sending unit 21 is further configured to send third information to the user equipment, where the third information indicates the transmission format used for the uplink data on the at least one logical channel corresponding to the at least one transmission class in the different transmission classes, and indicates the transmission resources in the transmission format.
  • the sending unit 21 is further configured to send fourth information to the user equipment.
  • the fourth information indicates a first location index of each transmission class in the at least one transmission class, and the first location index is used to identify a location, in the second information, of an amount of to-be-sent uplink data of each transmission class in the at least one transmission class.
  • FIG. 8 is a schematic structural diagram of a radio access device according to an embodiment of this application.
  • a radio access device 2000 shown in FIG. 8 includes a processor 2001 and a transceiver 2004 .
  • the processor 2001 and the transceiver 2004 are connected, for example, connected by using a bus 2002 .
  • the radio access device 2000 may further include a memory 2003 .
  • transceiver 2004 there is at least one transceiver 2004 in actual application, and a structure of the radio access device 2000 constitutes no limitation on this embodiment of this application.
  • the transceiver 2004 includes a receiver and a transmitter.
  • the transceiver 2004 is applied to this embodiment of this application, and is configured to implement functions of the sending unit 21 and the receiving unit 22 shown in FIG. 7 .
  • the processor 2001 may be a CPU, a general purpose processor, a DSP, an ASIC, an FPGA or another programmable logic device, a transistor logic device, a hardware component, or any combination thereof.
  • the processor 2001 may implement or execute various example logical blocks, modules, and circuits described with reference to content disclosed in this application.
  • the processor 2001 may be a combination of processors implementing a computing function, for example, a combination of one or more microprocessors, or a combination of a DSP and a microprocessor, and the like.
  • the bus 2002 may include a channel, used to transmit information between the foregoing components.
  • the bus 2002 may be a PCI bus, an EISA bus, or the like.
  • the bus 2002 may be classified into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is used to represent the bus in FIG. 8 , but this does not mean that there is only one bus or only one type of bus.
  • the memory 2003 may be a ROM or another type of static storage device that can store static information and instructions, or a RAM or another type of dynamic storage device that can store information and instructions; or may be an EEPROM, a CD-ROM or another compact disc storage, an optical disc storage (including a compact optical disc, a laser disc, an optical disc, a digital versatile disc, a Blu-ray disc, or the like), a magnetic disk storage medium or another magnetic storage device, or any other medium that can be configured to carry or store expected program code in a form of an instruction or a data structure and that can be accessed by a computer.
  • this is not limited thereto.
  • the memory 2003 is configured to store application program code for executing the solutions of this application, and the processor 2001 controls execution of the solutions of this application.
  • the processor 2001 is configured to execute the application program code stored in the memory 2003 , to implement actions of the radio access device provided in any of the embodiments shown in FIG. 2 to FIG. 4 .
  • An embodiment of this application further provides a computer storage medium, configured to store a computer software instruction used by the radio access device, and the computer software instruction includes a program designed for the radio access device to perform the foregoing aspects.
  • a process, a method, a system, a product, or a device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes an unlisted step or unit, or optionally further includes another step or unit inherent to the process, the method, the product, or the device.
  • this application may be provided as a method, an apparatus (device), or a computer program product. Therefore, this application may use a form of hardware only embodiments, software only embodiments, or embodiments with a combination of software and hardware. Moreover, this application may use a form of a computer program product that is implemented on one or more computer-usable storage media (including but not limited to a disk memory, a CD-ROM, an optical memory, and the like) that include computer usable program code.
  • the computer program is stored/distributed in a proper medium and is provided as or used as a part of the hardware together with other hardware, or may use another allocation form, such as by using the Internet or another wired or wireless telecommunications system.
  • These computer program instructions may be provided for a general-purpose computer, a dedicated computer, an embedded processor, or a processor of any other programmable data processing device to generate a machine, so that the instructions executed by a computer or a processor of any other programmable data processing device generate an apparatus for implementing a specific function in one or more processes in the flowcharts and/or in one or more blocks in the block diagrams.
  • These computer program instructions may also be stored in a computer readable memory that can instruct the computer or any other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory generate an artifact that includes an instruction apparatus.
  • the instruction apparatus implements a specific function in one or more processes in the flowcharts and/or in one or more blocks in the block diagrams.
  • These computer program instructions may also be loaded onto a computer or another programmable data processing device, so that a series of operations and steps are performed on the computer or the another programmable device, thereby generating computer-implemented processing. Therefore, the instructions executed on the computer or the another programmable device provide steps for implementing a specific function in one or more processes in the flowcharts and/or in one or more blocks in the block diagrams.
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